US7898143B2 - Rotary electric motor - Google Patents

Rotary electric motor Download PDF

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Publication number
US7898143B2
US7898143B2 US12/550,403 US55040309A US7898143B2 US 7898143 B2 US7898143 B2 US 7898143B2 US 55040309 A US55040309 A US 55040309A US 7898143 B2 US7898143 B2 US 7898143B2
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Prior art keywords
stator
load side
coil
copper wire
peripheral surface
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US12/550,403
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US20090322180A1 (en
Inventor
Tuyoshi Nonaka
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Assigned to KABUSHIKI KAISHA YASKAWA DENKI reassignment KABUSHIKI KAISHA YASKAWA DENKI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NONAKA, TUYOSHI
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/028—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots for fastening to casing or support, respectively to shaft or hub
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/223—Heat bridges

Definitions

  • the present invention relates to a rotary electric motor.
  • Known techniques are to, in a known rotary electric motor that includes a cylindrical rotor and a stator to which a stator coil is attached, for example, release heat generated in the stator coil from a frame provided around the stator to the exterior of the rotary electric motor or release heat from a load side bracket joined to the frame to the exterior of the rotary electric motor (for example, FIG. 2 in Japanese Unexamined Patent Application Publication No. 10-98844, FIG. 1 in Japanese Unexamined Patent Application Publication No. 2002-369449, FIG. 1 in Japanese Unexamined Patent Application Publication No. 2001-309595, and FIG. 1 in Japanese Unexamined Patent Application Publication No. 2005-72428).
  • a rotary electric motor includes a cylindrical rotor having an outer peripheral side, a stator provided to surround the outer peripheral side of the rotor with a gap between the stator and the rotor, and a load side bracket having a recess and provided on a load side of the stator.
  • the stator includes stator coils and a stator core having teeth portions around which the stator coils are wound.
  • a load side coil end of each of the stator coils protrudes from a load side end face of the stator core. At least two of an inner peripheral surface, an outer peripheral surface, and an end face of the load side coil end contact an inner surface of the recess via an insulator.
  • a rotary electric motor includes a cylindrical rotor having an outer peripheral side, a stator including stator coils and provided to surround the outer peripheral side of the rotor with a gap between the stator and the rotor, and a load side bracket having a recess and provided on a load side of the stator. At least two faces of an inner peripheral surface, an outer peripheral surface, and an end face of a load side coil end of each of the stator coils contact an inner surface of the recess via an insulator.
  • a method for manufacturing a rotary electric motor includes a cylindrical rotor, a stator that is provided on an outer peripheral side of the rotor, with a gap between the stator and the rotor, and includes a stator core including teeth portions and stator coils fixed to the teeth portions so that a load side coil end of each of the stator coils protrudes from a load side end face of the stator core, and a load side bracket provided on a load side of the stator, a recess being formed in a portion of the load side bracket opposing the load side coil end. At least two faces out of an inner peripheral surface, an outer peripheral surface, and an end face of the load side coil end are set close to the recess, with an insulator therebetween.
  • all of the inner peripheral surface, the outer peripheral surface, and the end face of the load side coil end may be set close to the recess, with an insulator therebetween.
  • the stator coil may be formed by, after winding a round copper wire that includes an insulating coating, forming outer surfaces of the wound round copper wire by applying pressure using a die.
  • the wound round copper wire may be bonded by heat fusion bonding of the insulating coating or using an adhesive.
  • outer surfaces of the stator coil may be formed by applying pressure using a die in a three-dimensional manner.
  • the stator coil may be formed of a copper wire that is wound in a fairly neat manner, crossing of the copper wire that occurs in winding may exist only on a first outer surface corresponding to an end face of an opposite-to-load side coil end of the stator coil, and outer surfaces other than the first outer surface may be formed by applying pressure using a die.
  • outer surfaces of the stator coil may be formed by applying pressure using a die, the stator coil, the outer surfaces of which have been formed by applying pressure, may be fixed to a corresponding one of the teeth portions of the stator core insulated with, for example, an insulating paper or powder coating, and the stator coil fixed to the teeth portion may be integrated with the stator core using an adhesive or molding resin.
  • FIG. 1 is a side elevational view of a rotary electric motor according to a first embodiment of the present invention
  • FIG. 2 is a front elevational view of the rotary electric motor shown in FIG. 1 ;
  • FIG. 3 is an exploded perspective view in which a stator is disassembled from a load side bracket
  • FIGS. 4A to 4D show how to wind a stator coil
  • FIGS. 5A and 5B are enlarged views of the neighborhood of a stator coil
  • FIG. 6 is a cross sectional view of a main section of a pressure forming jig in the first embodiment of the present invention.
  • FIGS. 7A and 7B show pressure forming of a stator coil
  • FIG. 8 is a cross sectional view of a pressure forming jig and a stator coil, as viewed from a direction perpendicular to the rotation axis direction;
  • FIG. 9 is a flowchart showing the procedure for manufacturing a stator
  • FIGS. 10A to 10C are views in which the heat releasing capability of a permanent magnet motor having a known structure is compared with the heat releasing capability of a permanent magnet motor according to the first embodiment of the present invention.
  • FIG. 11 is a side elevational view of a rotary electric motor according to a second embodiment of the present invention.
  • FIG. 1 is a side elevational view of a rotary electric motor according to a first embodiment of the present invention.
  • FIG. 2 is a front elevational view of the rotary electric motor shown in FIG. 1 .
  • a rotor is not shown.
  • reference numeral 1 denotes a rotary electric motor, for example, a permanent magnet motor.
  • the rotary electric motor 1 includes a stator 2 , a load side bracket 3 , an opposite-to-load side bracket 4 , a bearing 5 , a bearing 6 , a rotor 7 , and a rotation detector 8 .
  • the load side bracket 3 is disposed on the load side of the stator 2 .
  • a recess 3 a in the shape of a ring in the circumferential direction is formed on the stator 2 side of the load side bracket 3 .
  • the opposite-to-load side bracket 4 is disposed on the opposite-to-load side of the stator 2 .
  • the rotor 7 is cylindrical and includes a rotating shaft 7 a that is rotatably supported through the bearings 5 and 6 provided at the load side bracket 3 and the opposite-to-load side bracket 4 respectively.
  • a rotor core 7 b is fitted to the rotating shaft 7 a .
  • a permanent magnet 7 c is attached to the outer peripheral surface of the rotor core 7 b .
  • the rotor core 7 b is not necessarily required in the rotor 7 .
  • the permanent magnet 7 c may be attached to the outer peripheral surface of the rotating shaft 7 a of larger diameter.
  • the rotation detector 8 includes, for example, an encoder and is disposed on the opposite-to-load side of the opposite-to-load side bracket 4 .
  • the stator 2 includes a stator core 9 and stator coils 10 and is provided on the outer peripheral side of the rotor 7 , with a gap between the stator 2 and the rotor 7 .
  • the stator core 9 includes a yoke portion (an outside stator core) 9 a and teeth portions (an inside stator core) 9 b that are fitted and fixed to the yoke portion 9 a.
  • the stator coils 10 are fixed to the teeth portions 9 b . Portions between the teeth portions 9 b , a load side coil end 10 a of each of the stator coils 10 , and an opposite-to-load side coil end 10 b of the stator coil 10 are molded using resin 11 .
  • the load side coil end 10 a protrudes from the load side end face of the stator core 9 .
  • the outer shape of the load side coil end 10 a corresponds to the recess 3 a of the load side bracket 3 .
  • Three faces, an inner peripheral surface 10 aa , an outer peripheral surface 10 ab , and an end face 10 ac in the rotation axis direction (hereinafter simply called an end face), of the load side coil end 10 a contact an inner surface of the recess 3 a of the load side bracket 3 , with the resin 11 serving as an insulator between the three faces and the recess 3 a .
  • the load side coil end 10 a is inserted into the recess 3 a .
  • fixation of the load side coil end 10 a is solid compared with that in a case where, for example, only the end face 10 ac of the load side coil end 10 a is in contact with the load side bracket 3 , in which the recess 3 a is not formed. That is, contact between the load side coil end 10 a and the load side bracket 3 is stabilized.
  • reference letter 10 ba denotes the inner peripheral surface of the opposite-to-load side coil end 10 b
  • reference letter 10 bb denotes the outer peripheral surface of the opposite-to-load side coil end 10 b
  • reference letter 10 bc denotes an end face of the opposite-to-load side coil end 10 b.
  • the stator coil 10 includes an air-core coil formed by molding the outer shape of the load side coil end 10 a by applying pressure using a die after winding an inexpensive round copper wire that includes an insulating coating.
  • each of the inner peripheral surface 10 aa and the outer peripheral surface 10 ab of the load side coil end 10 a forms a highly accurate cylindrical surface
  • the end face 10 ac of the load side coil end 10 a forms a highly accurate conical surface.
  • each of the aforementioned three faces is substantially parallel to an opposing face of the recess 3 a of the load side bracket 3 .
  • the thickness of the resin 11 molding the load side coil end 10 a can be reduced to the maximum extent that insulation is ensured.
  • satisfactory heat transfer from the load side coil end 10 a to the load side bracket 3 can be achieved by reducing the distance between the load side coil end 10 a and the load side bracket 3 as much as possible.
  • the stator coil 10 is an air-core coil, a winding operation of winding a round copper wire around a bobbin is unnecessary, and any bobbin need not be used.
  • a bobbin does not prevent the gap between the load side coil end 10 a and the load side bracket 3 from being reduced.
  • known winding techniques and pressure forming techniques can be applied to forming an air-core coil, and thus any special copper wire, special coil formation device, and the like are unnecessary.
  • the faces 10 c and 10 d of the stator coil 10 at which the stator coil 10 is adjacent to other ones of the stator coils 10 are close to the other stator coils 10
  • the faces 10 c and 10 d are insulated from the other stator coils 10 using the resin 11 serving as an insulator while a correct insulation distance is kept.
  • FIG. 3 is an exploded perspective view in which the stator 2 is disassembled from the load side bracket 3 .
  • the rotor 7 is not shown.
  • the three faces, the inner peripheral surface 10 aa , the outer peripheral surface 10 ab , and the end face 10 ac , of the load side coil end 10 a contact the inner surface of the recess 3 a , with the resin 11 between the three faces and the recess 3 a .
  • heat generated in the stator coil 10 is more efficiently transferred from the load side coil end 10 a directly to the load side bracket 3 to be released to the exterior of the rotary electric motor 1 .
  • the load side coil end 10 a contact the inner surface of the recess 3 a of the load side bracket 3 , with the resin 11 serving as an insulator between the load side coil end 10 a and the recess 3 a . That is, the load side coil end 10 a is insulated from the recess 3 a with the resin 11 .
  • the load side coil end 10 a may be insulated from the recess 3 a with, instead of the resin 11 , the insulating coating of the round copper wire of the stator coil 10 . In this case, the load side coil end 10 a is in direct contact with the inner surface of the recess 3 a of the load side bracket 3 .
  • the present invention is not limited to this arrangement.
  • two faces out of the three faces may contact the inner surface of the recess 3 a of the load side bracket 3 .
  • the stator core 9 is constructed by combining the yoke portion (an outside stator core) 9 a and the teeth portions (an inside stator core) 9 b .
  • the stator coils 10 the outer shape of which is formed by applying pressure using a die are first fixed to the teeth portions 9 b insulated with, for example, an insulating paper or powder coating.
  • molding is performed using the resin 11 to integrate the yoke portion 9 a , the teeth portions 9 b , and the stator coils 10 .
  • the stator 2 is manufactured.
  • the yoke portion 9 a , the teeth portions 9 b , and the stator coils 10 may be integrated using an adhesive.
  • FIGS. 4A to 4D show how to wind the stator coil 10 .
  • FIG. 4A is a view in which the stator coil 10 is viewed from a direction perpendicular to the rotation axis direction. The right side of FIG. 4A is the load side direction, and the left side of FIG. 4A is the opposite-to-load side direction.
  • FIG. 4B is a view in which the stator coil 10 shown in FIG. 4A is viewed from the opposite-to-load side.
  • FIG. 4C is a view in which the stator coil 10 shown in FIG. 4A is viewed from the load side.
  • FIG. 4D is a view in which the stator coil 10 shown in FIG. 4A is viewed from the top of the FIG. 4A .
  • the stator coil 10 is formed of a round copper wire 12 that includes an insulating coating.
  • the round copper wire 12 is wound in a fairly neat manner from an end of the stator coil 10 on the opposite-to-load side.
  • the round copper wire 12 is wound entirely in parallel, and no lead for winding the round copper wire 12 is taken.
  • the lead of the round copper wire 12 is taken at the end face 10 bc of the opposite-to-load side coil end 10 b .
  • the lead of the round copper wire 12 is taken at the end face 10 bc of the opposite-to-load side coil end 10 b .
  • the round copper wire 12 is crossed between the upper and lower layers at the end face 10 bc of the opposite-to-load side coil end 10 b .
  • the three faces except the end face 10 bc of the opposite-to-load side coil end 10 b are relatively flat. This facilitates pressure forming in the downstream steps.
  • the stator coil 10 having been wound is fixed to a lower punch 13 b serving as a die. Subsequently, the three faces, except the end face 10 bc of the opposite-to-load side coil end 10 b , of the stator coil 10 are pressed in a three-dimensional manner, using the lower punch 13 b and other dies described below. In this operation, the outer shape of the stator coil 10 is formed.
  • the three faces, the inner peripheral surface 10 aa , the outer peripheral surface 10 ab , and the end face 10 ac , of the load side coil end 10 a of the stator coil 10 become substantially flat by forming the end face 10 ac of the load side coil end 10 a by applying pressure, as described above.
  • the thickness of the resin 11 molding the load side coil end 10 a can be reduced to the maximum extent that insulation is ensured.
  • satisfactory heat transfer from the load side coil end 10 a to the load side bracket 3 can be achieved by reducing the distance between the load side coil end 10 a and the load side bracket 3 as much as possible.
  • FIGS. 5A and 5B are enlarged views of the neighborhood of a stator coil.
  • FIG. 5A is a front elevational view of the neighborhood of the stator coil 10 according to the first embodiment.
  • FIG. 5B is a front elevational view of the neighborhood of a stator coil in a permanent magnet motor having a known structure shown in FIG. 2 in Japanese Unexamined Patent Application Publication No. 10-98844.
  • a stator coil 29 having a known structure is formed of a round copper wire that includes an insulating coating and is wound around a bobbin 44 , as shown in FIG. 5B .
  • the bobbin 44 around which the stator coil 29 is wound, is fixed to a teeth portion 28 b of a stator core.
  • the teeth portion 28 b to which the bobbin 44 is fixed, is disposed at a yoke portion (not shown) of the stator core.
  • molding is performed using resin to integrate the yoke portion, the teeth portion 28 b , the bobbin 44 , and the stator coil 29 .
  • a known stator is manufactured.
  • the bobbin 44 is required to have sufficient strength to endure pressure applied in winding of the stator coil 29 .
  • the shape of the bobbin 44 has a thickness equal to or more than that necessary in view of insulation performance.
  • the stator coil 29 is wound into a shape corresponding to the shape of the bobbin 44 , the stator coil 29 is substantially trapezoidal in cross section, as shown in FIG. 5B .
  • the stator coil 10 is formed of a round copper wire that includes an insulating coating, as shown in FIG. 5A .
  • the stator coil 10 is formed by molding the outer shape by pressing the wound round copper wire using a die.
  • the stator coils 10 the outer shape of which is formed are fixed to the teeth portions 9 b insulated with, for example, an insulating paper or powder coating.
  • molding is performed using the resin 11 to integrate the yoke portion 9 a , the teeth portions 9 b , and the stator coils 10 .
  • the stator 2 is formed.
  • stator coil 10 Since the outer shape of the stator coil 10 is formed by applying pressure in a three-dimensional manner, except the end face 10 bc of the opposite-to-load side coil end 10 b , spaces where the stator core 9 does not exist can be fully used as spaces for the stator coil 10 .
  • the area of the cross section of the stator coil 10 is about 140% of that of the known structure.
  • FIG. 6 is a cross sectional view of a main section of a pressure forming jig 13 that forms the stator coil 10 by applying pressure in the first embodiment of the present invention.
  • the pressure forming jig 13 includes an upper punch 13 a , the lower punch 13 b , and a die 13 c , as shown in FIG. 6 .
  • a coil fixing space 14 is formed among the upper punch 13 a , the lower punch 13 b , and the die 13 c .
  • the stator coil 10 formed of a round copper wire that is wound and includes an insulating coating is fixed in the coil fixing space 14 .
  • FIGS. 7A and 7B show pressure forming of the stator coil 10 using the pressure forming jig 13 .
  • FIG. 7A shows a state in which pressure has not been applied using the upper punch 13 a .
  • FIG. 7B shows a state in which pressure has been applied using the upper punch 13 a.
  • the outer shape of the stator coil 10 fixed in the coil fixing space 14 is formed by applying pressure by moving the upper punch 13 a downward from a position shown in FIG. 7A to a position shown in FIG. 7B .
  • An outline arrow shown in FIG. 7B indicates the movement direction of the upper punch 13 a.
  • FIG. 8 is a cross sectional view of the pressure forming jig 13 and the stator coil 10 shown in FIGS. 7A and 7B , as viewed from a direction perpendicular to the rotation axis direction.
  • An outline arrow shown in FIG. 8 indicates the movement direction of the upper punch 13 a.
  • the upper punch 13 a , the lower punch 13 b , and the die 13 c have shapes such that the end face 10 bc of the opposite-to-load side coil end 10 b is not pressed, as shown in FIG. 8 .
  • the outer shape of the stator coil 10 except the end face 10 bc of the opposite-to-load side coil end 10 b , can be instantaneously formed by applying pressure, using the pressure forming jig 13 , in a three-dimensional manner.
  • the shape of the stator coil 10 may be fixed by bonding a wound round copper wire by impregnating the round copper wire with varnish or by bonding a wound round copper wire by heat fusion bonding the insulating coating of the round copper wire.
  • the fixation of the shape of the stator coil 10 facilitates handling of the stator coil 10 in the downstream steps.
  • the shape of the stator coil 10 may be fixed before pressure forming or after pressure forming.
  • FIG. 9 is a flowchart showing the procedure for manufacturing the stator 2 described above.
  • FIG. 9 shows a process from manufacturing the stator core 9 to completing the stator 2 .
  • the wound round copper wire 12 is bonded.
  • the stator coil 10 is completed by forming the outer shape of the bonded round copper wire 12 by applying pressure.
  • the wound round copper wire 12 may be bonded after pressure forming.
  • the completed stator coils 10 are fixed to the teeth portions 9 b of the stator core 9 insulated with, for example, an insulating paper or powder coating.
  • FIGS. 10A to 10C are views in which the heat releasing capability of a permanent magnet motor having a known structure shown in FIG. 1 in Japanese Unexamined Patent Application Publication No. 2002-369449 is compared with the heat releasing capability of a permanent magnet motor having the structure of the first embodiment.
  • heat transfer is calculated in a state in which an 800-W-rated motor is attached to a wide heat sink in a room where ambient temperature is 60° C.
  • FIG. 10A shows temperature at the entrance and temperature at the exit of each part on a heat release path in the known structure.
  • heat at 82.5 W is generated from the interior of a stator coil
  • the heat release path is a path on which the heat is released to the exterior of the motor via a frame and a load side bracket.
  • the entrance of a bobbin is the outer peripheral surface of the bobbin in contact with the stator coil
  • the exit of the bobbin is the inner peripheral surface of the bobbin in contact with a stator core.
  • the internal temperature of the stator coil reaches 105° C.
  • the heat of the stator coil was transferred to the outer peripheral surface (entrance) of the bobbin, with a small drop in temperature, to be transferred to the stator core, with a drop of about 20° C. in temperature in the bobbin.
  • the heat transferred to the stator core is released to the exterior of the motor via the frame and the load side bracket.
  • FIG. 10B shows temperature at the entrance and temperature at the exit of each part on a heat release path in the structure of the first embodiment.
  • FIG. 10B as in the case with FIG. 10A , it is assumed that heat at 82.5 W is generated from the interior of a stator coil.
  • the heat release path is a path on which the heat is released to the exterior of the motor via a load side bracket, bypassing a frame.
  • FIG. 10C shows temperature at the entrance and temperature at the exit of each part on a heat release path in a case where heat in the stator coil 10 was increased until the internal temperature of the stator coil 10 in the structure of the first embodiment reached 105° C., as in the case with the known structure. This state is considered as the rated output of the structure of the first embodiment.
  • FIG. 11 is a side elevational view of a rotary electric motor according to a second embodiment of the present invention. While no frame is provided in the rotary electric motor according to the first embodiment, as shown in FIG. 1 , a frame 15 may be provided, as in a rotary electric motor 1 a according to the second embodiment shown in FIG. 11 .
  • the frame 15 is cylindrical and holds the stator 2 , with the stator 2 being fitted to the inner peripheral surface of the frame 15 .
  • a load side end 15 a of the frame 15 is in close contact with the load side bracket 3 .
  • the size increases accordingly.
  • heat generated in the stator coil 10 can be released to the exterior of the rotary electric motor 1 a from not only the load side bracket 3 but also the frame 15 .
  • heat generated in the stator coil 10 can be more efficiently released to the exterior, thereby improving the rated output of the rotary electric motor 1 a.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Windings For Motors And Generators (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
US12/550,403 2007-06-06 2009-08-31 Rotary electric motor Active US7898143B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007150638 2007-06-06
JP2007-150638 2007-06-06
PCT/JP2008/058904 WO2008149649A1 (ja) 2007-06-06 2008-05-15 回転電機およびその製造方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/058904 Continuation WO2008149649A1 (ja) 2007-06-06 2008-05-15 回転電機およびその製造方法

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US7898143B2 true US7898143B2 (en) 2011-03-01

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JP (1) JP5600938B2 (zh)
CN (1) CN101669267B (zh)
TW (1) TW200910732A (zh)
WO (1) WO2008149649A1 (zh)

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US20150137654A1 (en) * 2012-08-03 2015-05-21 Kabushiki Kaisha Yaskawa Denki Rotating electric machine
US20150229175A1 (en) * 2014-02-13 2015-08-13 Sanyo Denki Co., Ltd. Stator, method for manufacturing stator, and motor
US20160285346A1 (en) * 2015-03-27 2016-09-29 Russel Hugh Marvin Cooling device for motor

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JP5691930B2 (ja) * 2011-08-09 2015-04-01 トヨタ自動車株式会社 回転電機
JP5819703B2 (ja) * 2011-10-27 2015-11-24 株式会社神戸製鋼所 電動機
JP5843657B2 (ja) * 2012-02-24 2016-01-13 三菱電機株式会社 回転電機の製造方法
WO2014030214A1 (ja) * 2012-08-21 2014-02-27 株式会社安川電機 コイル、回転電機、及びコイルの製造方法
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JP6372562B2 (ja) 2014-03-19 2018-08-15 株式会社安川電機 回転電機
US10491078B2 (en) * 2014-03-28 2019-11-26 Fuji Corporation Linear motor heat dissipation structure
EP2975736B1 (de) * 2014-07-17 2016-12-14 Siemens Aktiengesellschaft Stator einer rotierenden elektrischen Maschine und dessen Herstellung
CN104505965A (zh) * 2014-12-17 2015-04-08 黄永怀 一种电动拉铆枪用电机装置
JP6298420B2 (ja) * 2015-03-31 2018-03-20 ミネベアミツミ株式会社 モータの固定子構造及びモータ
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TWI558067B (zh) 2015-09-18 2016-11-11 財團法人工業技術研究院 一種電機繞線框架結構
WO2017046952A1 (ja) * 2015-09-18 2017-03-23 株式会社安川電機 回転電機
JP6708470B2 (ja) * 2016-04-14 2020-06-10 ファナック株式会社 絶縁構造を有する電動機のステータ
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JP7103057B2 (ja) * 2018-08-23 2022-07-20 トヨタ自動車株式会社 ロータコア及びその製造方法
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